CN111173523B - Method for constructing underground box culvert by using open type shield tunneling machine - Google Patents
Method for constructing underground box culvert by using open type shield tunneling machine Download PDFInfo
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- CN111173523B CN111173523B CN202010052748.1A CN202010052748A CN111173523B CN 111173523 B CN111173523 B CN 111173523B CN 202010052748 A CN202010052748 A CN 202010052748A CN 111173523 B CN111173523 B CN 111173523B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Abstract
The invention discloses a method for constructing an underground box culvert by using an open type shield machine, which comprises the following steps: tunneling from a starting well to a receiving well by using an open type shield tunneling machine, wherein the top of the open type shield tunneling machine is flush with the ground; excavating and moving soil on the ground in front of the open shield machine through an excavator; stopping the open type shield tunneling machine after tunneling for a preset distance, and hoisting a culvert body into a culvert body guide box chamber in the open type shield tunneling machine by using a culvert body hoisting mechanism on the ground to be connected with the installed culvert body; after the installation of the culvert body is finished, continuously controlling the open type shield tunneling machine to tunnel forwards; and repeating the steps until the construction of the underground box culvert is finished. The construction influence range of the shield machine is smaller than that of an open cut method, and the shield machine can be used in narrow construction occasions; (2) the side surface and the bottom gap of the culvert body are filled with synchronous grouting materials, so that the influence on the periphery is reduced; (3) and the shield oil cylinder is adopted for propulsion, so that noise and vibration can be reduced.
Description
Technical Field
The invention belongs to the technical field of underground box culverts, and particularly relates to a method for constructing an underground box culvert by using an open type shield machine.
Background
At present, most of urban underground box culverts are constructed by adopting a construction mode of slope-laying excavation and support cast-in-place, and the mode has the disadvantages of large field workload, difficult guarantee of the on-site pouring quality of the underground box culverts, long maintenance time of the underground box culverts, great influence on the surrounding environment and the like; recently, the construction modes of prefabrication in factories, transportation of underground box culverts and on-site assembly and tensioning are started, and the mode adopts the hoisting modes of slope excavation by an excavator on site, transportation of conventional trailers, truck cranes or crawler cranes and the like for the underground box culverts. Due to the problems that the side of the underground box culvert foundation pit is large in attached slope and bears on the attached slope, the crane is far away in station position and can only lift and assemble the underground box culvert with small tonnage.
In addition, the hoisting steel wire rope is long, so that the assembly precision of the underground box culvert is influenced. With the increasing maturity of shield machine excavation technology and prefabricated box culvert technology, how to comprehensively apply the mature technology to perform safe, economic and efficient prefabricated underground box culvert construction is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a method for constructing an underground box culvert by using an open type shield machine according to the defects of the prior art, the method realizes the construction of the underground box culvert in a narrow place by adopting the open type shield machine for tunneling and using a culvert body hoisting mechanism for hoisting and installing a culvert body, and simultaneously reduces the influence on the periphery by filling synchronous grouting materials in the side surface and the bottom gap of the culvert body.
The purpose of the invention is realized by the following technical scheme:
a method for constructing an underground box culvert by using an open type shield tunneling machine is characterized by comprising the following steps: tunneling from a starting well to a receiving well by using an open type shield tunneling machine, wherein the top of the open type shield tunneling machine is flush with the ground; soil excavation and moving are carried out on the ground in front of the open type shield machine through an excavator; stopping the open type shield tunneling machine after tunneling for a preset distance, and hoisting a culvert body into a culvert body guide box chamber in the open type shield tunneling machine by using a culvert body hoisting mechanism on the ground to be connected with the installed culvert body; after the culvert body is installed, the open type shield tunneling machine is continuously controlled to tunnel forwards; and repeating the steps until the open type shield tunneling machine reaches the receiving well to finish the construction of the underground box culvert.
The open type shield machine comprises a front tunneling cabin and a rear culvert body installation cabin which are hinged with each other, wherein the rear culvert body installation cabin sequentially comprises a shield oil cylinder mechanism, a culvert body leading-in box chamber and a tail retaining plate from front to back; the shield oil cylinder mechanism comprises at least two rows of shield oil cylinders and one row of shield oil cylinders, one end of each shield oil cylinder is fixed on the inner wall surface of the front end wall plate of the rear culvert body installation cabin, and the other end of each shield oil cylinder is fixedly provided with an axial iron jacking block which is used for contacting with the front end surface of the culvert body when the shield oil cylinders are jacked; when the open type shield machine is used for forwards tunneling, the shield oil cylinder jacks the installed culvert body, and the open type shield machine is pushed forwards by taking the installed culvert body as a counter-force mechanism.
The open type shield tunneling machine comprises a front tunneling cabin, a middle counter-force supporting cabin and a rear culvert body mounting cabin which are sequentially connected, wherein a plurality of hydraulic propulsion oil cylinders are arranged at the tail end of the front tunneling cabin, one end of each hydraulic propulsion oil cylinder is fixed on the tail end face of the front tunneling cabin, and the other end of each hydraulic propulsion oil cylinder is fixed on the front end face of the middle counter-force supporting cabin; telescopic hydraulic supporting arms are respectively arranged on two side wall surfaces of the middle counter-force supporting cabin, and friction iron blocks are arranged on the end surfaces of the hydraulic supporting arms; the rear culvert body installation cabin comprises a culvert body leading-in box chamber and a tail retaining plate;
the forward tunneling method of the open type shield tunneling machine comprises the following steps: the hydraulic supporting top arm on the middle counterforce supporting cabin extends out of a peripheral soil body to improve the friction force between the hydraulic supporting top arm and the peripheral soil body, the middle counterforce supporting cabin is used as a counterforce supporting structure, and the hydraulic propulsion oil cylinder on the tail end part of the front tunneling cabin is jacked under the support of the middle counterforce supporting cabin to propel the front tunneling cabin to tunnel forwards; and after the hydraulic propulsion oil cylinder is jacked to the maximum stroke, the front tunneling cabin stops tunneling forwards, the hydraulic supporting arms are controlled to retract inwards, and then the hydraulic propulsion oil cylinder is controlled to retract so as to pull the middle counter-force supporting cabin to move forwards.
Mortar injection holes are respectively formed in the bottom surface and two side wall surfaces of the culvert body, and when the culvert body is installed and is located in the range of the tail retaining plate, grouting equipment is used for performing primary grouting through the mortar injection holes in the culvert body so as to form a primary grouting material layer in a gap between the outer wall surface of the culvert body and the open type shield tunneling machine; and after the culvert body is separated from the range of the open type shield tunneling machine, performing secondary grouting through the mortar injection hole on the culvert body by using grouting equipment so as to form a secondary grouting material layer in a gap between the primary grouting material layer and the soil body.
The size of the culvert body introduction box chamber is matched with the size of the culvert body, and the culvert body introduction box chamber comprises a bottom plate and partition plates on two sides.
The front two sides of the front tunneling cabin are respectively provided with a sliding type soil retaining arm, the front end part of the sliding type soil retaining arm is a wedge-shaped surface beneficial to cutting and jacking, and the rear end part of the sliding type soil retaining arm is driven by a hydraulic oil cylinder in the front tunneling cabin to slide and stretch.
And covering the backfill soil above the constructed culvert body by using a backfill soil excavator.
And injection holes are respectively formed in the bottom of the machine body and two side wall surfaces of the open type shield tunneling machine, and a friction reducer is injected into a gap between the machine body and an outer side soil body through the injection holes.
The invention has the advantages that: (1) the construction influence range of the shield machine is smaller than that of an open cut method, and the shield machine can be used in narrow construction occasions; (2) the side surface and the bottom gap of the culvert body are filled with synchronous grouting materials, so that the influence on the periphery is reduced; (3) the shield oil cylinder is adopted for propulsion, so that noise and vibration can be reduced; (4) the open type shield machine consists of a front tunneling cabin and a rear culvert body installation cabin which are hinged with each other, and can carry out curve construction; (5) the open type shield machine can be covered with a lane plate, and the road surface can be opened outside the working time; (6) the middle counter-force supporting cabin generates friction force with soil bodies on two sides and the bottom through the telescopic hydraulic supporting arms, provides propelling counter-force for the hydraulic propelling oil cylinder on the front tunneling cabin, and achieves self-walking of the open type shield tunneling machine.
Drawings
Fig. 1 is a schematic construction diagram of an open shield tunneling machine system in embodiment 1 of the present invention;
fig. 2 is a schematic plan view of an open shield tunneling machine according to embodiment 1 of the present invention;
FIG. 3 is a schematic vertical sectional view of a culvert in embodiment 1 of the present invention;
fig. 4 is a schematic construction diagram of an open shield tunneling machine system in embodiment 2 of the present invention;
fig. 5 is a schematic plan view of an open shield tunneling machine according to embodiment 2 of the present invention;
figure 6 is a schematic vertical section of a culvert in embodiment 2 of the invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
referring to fig. 1-6, the labels 1-32 in the figures are: the open type shield tunneling machine comprises an open type shield tunneling machine 1, a culvert body hoisting mechanism 2, an excavator 3, a culvert body 4, a front tunneling cabin 5, a rear culvert body installation cabin 6, a hinge mechanism 7, a shield oil cylinder 8, a sliding type soil retaining arm 9, a culvert body leading-in box chamber 10, a tail soil retaining plate 11, a mortar injection hole 12, a first grouting material layer 13, a second grouting material layer 14, a top iron block 15, a shield oil cylinder mechanism 16, an open type shield tunneling machine 17, an excavator 18, a culvert body hoisting mechanism 19, a front tunneling cabin 20, a middle counter-force supporting cabin 21, a rear culvert body installation cabin 22, a culvert body 23, a hydraulic propulsion oil cylinder 24, a hydraulic supporting arm 25, a sliding type soil retaining arm 26, a friction iron block 27, a culvert body leading-in box chamber 28, a tail soil retaining plate 29, a mortar injection hole 30, a first grouting material layer 31 and a second grouting material layer 32.
Example 1: as shown in fig. 1, 2 and 3, the embodiment specifically relates to a method for constructing an underground box culvert by using an open shield machine, which mainly comprises the following steps:
(1) preparing various construction machines and underground box culvert components, which mainly comprise an open shield machine 1, a culvert body hoisting mechanism 2, an excavator 3, an excavator for backfilling and a plurality of culvert bodies 4; wherein:
the open type shield tunneling machine 1 comprises a front tunneling cabin 5 and a rear culvert body installation cabin 6 which are hinged through a hinge mechanism 7, and relative bending can be generated between the front tunneling cabin 5 and the rear culvert body installation cabin 6 through the left-right and up-down stroke difference of the hinge mechanism 7 so as to carry out curve construction;
the front tunneling cabin 5 can cut and tunnel soil, sliding type soil retaining arms 9 are arranged on two sides of the front portion of the front tunneling cabin, the front ends of the sliding type soil retaining arms 9 are wedge-shaped surfaces (single-side) beneficial to cutting and jacking, the rear ends of the sliding type soil retaining arms 9 are driven by a hydraulic oil cylinder located in the front tunneling cabin 5 to slide and stretch back and forth, and the stretching of the sliding type soil retaining arms 9 is used for supporting an excavation area and controlling the gradient of a front excavation surface;
the rear culvert body installation cabin 6 sequentially comprises a shield oil cylinder mechanism 16, a culvert body leading-in box chamber 10 and a tail retaining plate 11 from front to back, the shield oil cylinder mechanism 16 comprises a left row of shield oil cylinders 8 and a right row of shield oil cylinders 8 and a row of shield oil cylinders 8 at the bottom, the front ends of the shield oil cylinders 8 are fixed on the inner wall surface of a front end wall plate of the rear culvert body installation cabin 6, axial jacking iron blocks 15 are fixedly arranged on the rear ends of the shield oil cylinders 8, and the contact area of the shield oil cylinders 8 when jacking the culvert bodies 4 can be effectively increased through the arrangement of the jacking iron blocks 15; the culvert body introduction box chamber 10 comprises a bottom plate and partition plates on two sides, and the size of the inner chamber of the culvert body introduction box chamber 10 is matched with that of the culvert body 4 so as to guide the culvert body 4 and install the culvert body; the rear soil guard plate 11 is used for soil guard operation at the time of curve construction.
Injection holes are respectively arranged on the bottom of the machine body and two side wall surfaces of the open type shield machine, and a friction reducing agent is filled in a gap between the machine body and an outer side soil body through the injection holes, wherein the friction reducing agent can be mortar or bentonite.
(2) After preparation of various construction tools and underground box culvert components is finished, controlling the open type shield tunneling machine 1 to tunnel from a starting well to a receiving well, and enabling the top surface of the open type shield tunneling machine 1 to be flush with the ground to form open type shield construction; the soil body generated in the tunneling process is dug by the excavator 3 and is transported out by a truck;
(3) after the front tunneling cabin 5 of the open type shield tunneling machine 1 tunnels for a certain distance, the tunneling is stopped, and after the tunneling is stopped, a culvert body 4 is hoisted to the culvert body leading-in box chamber 10 of the open type shield tunneling machine 1 by using a culvert body hoisting mechanism 2, and the culvert body 4 of the existing underground box culvert are longitudinally connected to form an integral structure; after the connection is completed, in the range of the tail retaining plate 11, performing first grouting by means of a mortar injection hole 12 formed in the culvert body 4 to form a first grouting material layer 13 as shown in fig. 2 and 3, wherein the first grouting material layer 13 fills the gap between the outer wall surface of the culvert body 4 and the open type shield tunneling machine 1, including the gaps at the two sides and the bottom of the culvert body 4;
(4) after the culvert body 4 in the culvert body introduction box chamber 10 is installed, starting the shield oil cylinder mechanism 16 to extend to the front end wall surface of the culvert body 4, taking the culvert body 4 as a counter-force support, and enabling the open type shield tunneling machine 1 to be capable of advancing and tunneling by continuously extending the shield oil cylinder mechanism 16; stopping propelling after the shield oil cylinder mechanism 16 extends to the maximum stroke, and performing second grouting by means of a mortar injection hole 12 formed in the culvert body 4, so that grout is filled in a gap between the first grouting material layer 13 and the soil body to form a second grouting material layer 14 shown in figures 2 and 3, and the filled grout is used for keeping the stability of the surrounding soil body after being solidified, so that the influence of tunneling construction on the surrounding soil body is reduced; it should be noted that, the upper part of the culvert body 4 which is finished with the construction is covered with backfill soil by a dredger;
(5) and (5) repeating the steps (2) to (4) to continuously lay the culvert body 4 until the construction of the whole underground box culvert line is completed, and enabling the open type shield tunneling machine 1 to reach a receiving well.
The embodiment is particularly suitable for building and rebuilding drainage channels and river channels in narrow urban areas, can approach important buildings under the severe construction conditions of abundant soft soil and underground water, such as railway, national roads, bridges, iron towers, rainwater storage pipelines and other construction operations, and realizes safe and reliable rapid construction. Conventional ripping equipment can damage the back soil during the machine propulsion process, and the degree of impact has become a construction problem. The advantages are that:
(1) the construction with small curves can be carried out.
(2) Can be constructed in the proximity range of buildings and other structures.
(3) The construction method can be used for constructing weak formations and water-bearing formations.
(4) The top of the shield machine can be opened.
(5) The construction method has low noise and vibration.
(6) The construction range is small, the environmental influence is low, and the slag soil or the piled soil generated on the site is little, so the method is an environment-friendly method.
(7) The existing underground structure can be penetrated.
(8) The existing water channel can be easily repaired.
(9) The construction method has little influence on surrounding residents and traffic.
(10) The shield machine may be left in the ground.
(11) The construction period can be shortened.
(12) Safe and economical.
The open shield tunneling method and the open excavation method in the embodiment have the advantages that:
(1) compared with the prior art, the construction surface is small, and the amount of the produced muck is small.
(2) The special sheet pile plugging operation of a steel sheet pile maintenance method, namely the pressing-in and drawing-out operation of the steel sheet pile is not needed, and the influence on the ground and the surrounding ground is small.
(3) In the open shield construction method, plastic materials are used for filling gaps at the side and the bottom of the box culvert in real time, and the open excavation method causes the inner part of the box culvert to be loose because the backfill materials at the side of the box culvert cannot be compacted.
(4) Because the side plates and the bottom plate of the open shield machine form a soil body maintenance structure, surrounding rocks are excavated, disasters such as gushing of soil bodies and sand boiling piping are basically avoided, and the safety of box culvert construction operation can be ensured.
(5) Compared with the open cut method, the open section has short operation time, small construction operation surface, less collapse accidents and third-party disaster accidents and higher safety.
Example 2: as shown in fig. 4, 5, and 6, the present embodiment specifically relates to a method for constructing an underground box culvert by using an open shield machine, which mainly includes the following steps:
(1) preparing various construction machines and underground box culvert components, which mainly comprise an open type shield machine 17, a culvert body hoisting mechanism 19, an excavator 18, an excavator for backfilling and a plurality of culvert bodies 23; wherein:
the open type shield tunneling machine 17 comprises a front tunneling cabin 20, a middle reaction supporting cabin 21 and a rear culvert body installing cabin 22 which are sequentially connected, wherein:
the front tunneling cabin 20 can cut and tunnel a soil body, sliding type soil retaining arms 26 are arranged on two sides of the front portion of the front tunneling cabin, the front ends of the sliding type soil retaining arms 26 are wedge-shaped surfaces (single-side) beneficial to cutting and jacking, the rear ends of the sliding type soil retaining arms 26 are driven by a hydraulic oil cylinder (not shown in the figure) in the front tunneling cabin 20 to slide and stretch back and forth, and the stretching of the sliding type soil retaining arms 9 is used for supporting an excavation area and controlling the gradient of a front excavation surface; meanwhile, a plurality of hydraulic propulsion cylinders 24 are arranged between the front tunneling cabin 20 and the middle reaction force supporting cabin 21 for connection, one end of each hydraulic propulsion cylinder 24 is fixedly connected with the tail end face of the front tunneling cabin 20, the other end of each hydraulic propulsion cylinder 24 is fixedly connected with the front end face of the middle reaction force supporting cabin 21, and the middle reaction force supporting cabin 21 can serve as a reaction support to provide reaction force for the hydraulic propulsion cylinders 24 to propel the front tunneling cabin 20 to advance;
two side wall surfaces of the middle reaction force supporting cabin 21 are respectively provided with a telescopic hydraulic supporting arm 25, the end part of the hydraulic supporting arm 25 is provided with a friction iron block 27, the hydraulic supporting arm 25 is controlled to extend outwards and act on soil mass on the periphery of the middle reaction force supporting cabin 21, so that the friction force between the friction iron block 27 at the end part of the hydraulic supporting arm 25 and the soil mass is enhanced, when the hydraulic propulsion oil cylinder 24 is lifted to propel the front tunneling cabin 20, the middle reaction force supporting cabin 21 can keep in-situ and provide reaction force support for the hydraulic propulsion oil cylinder 24;
the back culvert body installation cabin 22 comprises a culvert body introduction box chamber 28 and a tail retaining plate 29 from front to back, the culvert body introduction box chamber 28 comprises a bottom plate and partition plates on two sides, and the size of an inner chamber of the culvert body introduction box chamber 28 is matched with that of the culvert body 23 so as to guide the culvert body 23 and install the culvert body; the rear soil guard plate 29 is used for soil guard operation at the time of construction.
Injection holes are respectively arranged on the bottom of the machine body and two side wall surfaces of the open type shield machine, and a friction reducing agent is filled in a gap between the machine body and an outer side soil body through the injection holes, wherein the friction reducing agent can be mortar or bentonite.
Mortar injection holes 30 are respectively formed on the bottom surface and both side wall surfaces of each culvert 23 so as to facilitate corresponding grouting operations during construction.
(2) After preparation of various construction tools and underground box culvert components is finished, controlling the open type shield machine 17 to tunnel from a starting well to a receiving well, and enabling the top surface of the open type shield machine 17 to be flush with the ground to form open type shield construction;
(3) controlling the middle counter-force support cabin 21 of the open type shield machine 17 to enable the hydraulic support arms 25 on the two side wall surfaces of the middle counter-force support cabin to extend out of peripheral soil bodies, so that the friction force between the friction iron blocks 27 of the hydraulic support arms 25 and the soil bodies is improved, and the middle counter-force support cabin 21 can be kept in a fixed position after being stressed;
(4) under the condition that the middle reaction force supporting cabin 21 provides reaction force, the hydraulic propulsion oil cylinder 24 is controlled to lift and propel the front tunneling cabin to advance, the front tunneling cabin 20 tunnels in soil, and the soil generated in the tunneling process is excavated by the excavator 18 and is transported out by a truck;
(5) after the front tunneling compartment 20 tunnels to reach the maximum stroke of the hydraulic thrust cylinder 24, controlling the hydraulic jacking arm 25 on the middle reaction force supporting compartment 21 to contract inwards so as to reduce the friction force between the hydraulic jacking cylinder 24 and the soil body, and then contracting the hydraulic thrust cylinder 24 so as to drive the middle reaction force supporting compartment 21 and the rear culvert body installation compartment 22 to advance, wherein the self weight of the front tunneling compartment 20 is larger so that a larger friction force can be generated between the front tunneling compartment and the soil body; after the middle counter-force supporting cabin 21 advances for a certain distance, hoisting a culvert body 23 to the culvert body leading-in box chamber 28 of the open shield machine 17 by using a culvert body hoisting mechanism 19, and longitudinally connecting the culvert body 23 with the culvert body 23 of the existing underground box culvert to form an integral structure; after the connection is completed, in the range of the tail retaining plate 29, performing first grouting by means of a mortar injection hole 30 formed in the culvert 23 to form a first grouting material layer 31 as shown in fig. 5 and 6, wherein the first grouting material layer 31 fills the gap between the outer wall surface of the culvert 23 and the open type shield tunneling machine 17, including the gaps at the two sides and the bottom of the culvert 23; meanwhile, the periphery of the culvert body 23 behind the tail retaining plate 29 is subjected to secondary grouting through the mortar injection hole 30, so that the grout is filled in the gap between the primary grouting material layer 31 and the soil body to form a secondary grouting material layer 32 shown in fig. 5 and 6, and the filled grout is used for keeping the stability of the surrounding soil body after being solidified, so that the influence of tunneling construction on the surrounding soil body is reduced; it should be noted that, the upper part of the culvert body 23 which is finished with the construction is covered with backfill soil by a dredger;
(6) and (5) continuously laying the culvert body 23 by repeating the steps (2) to (5) until the construction of the whole underground box culvert is finished, and enabling the open type shield tunneling machine 17 to reach a receiving well.
The beneficial effect of this embodiment lies in: (1) the construction influence range of the shield machine is smaller than that of an open cut method, and the shield machine can be used in narrow construction occasions; (2) the middle counter-force supporting cabin generates friction force with soil bodies on two sides and the bottom through the telescopic hydraulic supporting arms, provides propelling counter-force for the hydraulic propelling oil cylinder on the front tunneling cabin, and achieves self-walking of the open type shield tunneling machine.
Claims (7)
1. A method for constructing an underground box culvert by using an open type shield tunneling machine is characterized by comprising the following steps: tunneling from a starting well to a receiving well by using an open type shield tunneling machine, wherein the top of the open type shield tunneling machine is flush with the ground; soil excavation and moving are carried out on the ground in front of the open type shield machine through an excavator; stopping the open type shield tunneling machine after tunneling for a preset distance, and hoisting a culvert body into a culvert body guide box chamber in the open type shield tunneling machine by using a culvert body hoisting mechanism on the ground to be connected with the installed culvert body; after the culvert body is installed, the open type shield tunneling machine is continuously controlled to tunnel forwards; the steps are repeated until the open type shield tunneling machine reaches the receiving well to finish the construction of the underground box culvert;
the open type shield tunneling machine comprises a front tunneling cabin, a middle counter-force supporting cabin and a rear culvert body mounting cabin which are sequentially connected, wherein a plurality of hydraulic propulsion oil cylinders are arranged at the tail end of the front tunneling cabin, one end of each hydraulic propulsion oil cylinder is fixed on the tail end face of the front tunneling cabin, and the other end of each hydraulic propulsion oil cylinder is fixed on the front end face of the middle counter-force supporting cabin; telescopic hydraulic supporting arms are respectively arranged on two side wall surfaces of the middle counter-force supporting cabin, and friction iron blocks are arranged on the end surfaces of the hydraulic supporting arms; the rear culvert body installation cabin comprises a culvert body leading-in box chamber and a tail retaining plate;
the forward tunneling method of the open type shield tunneling machine comprises the following steps: the hydraulic supporting top arm on the middle counterforce supporting cabin extends out of a peripheral soil body to improve the friction force between the hydraulic supporting top arm and the peripheral soil body, the middle counterforce supporting cabin is used as a counterforce supporting structure, and the hydraulic propulsion oil cylinder on the tail end part of the front tunneling cabin is jacked under the support of the middle counterforce supporting cabin to propel the front tunneling cabin to tunnel forwards; and after the hydraulic propulsion oil cylinder is jacked to the maximum stroke, the front tunneling cabin stops tunneling forwards, the hydraulic supporting arms are controlled to retract inwards, and then the hydraulic propulsion oil cylinder is controlled to retract so as to pull the middle counter-force supporting cabin to move forwards.
2. The method for constructing the underground box culvert by using the open type shield tunneling machine according to claim 1, wherein the open type shield tunneling machine comprises a front tunneling cabin and a rear culvert body installation cabin which are hinged with each other, and the rear culvert body installation cabin sequentially comprises a shield oil cylinder mechanism, a culvert body introduction box chamber and a tail retaining plate from front to back; the shield oil cylinder mechanism comprises at least two rows of shield oil cylinders and one row of shield oil cylinders, one end of each shield oil cylinder is fixed on the inner wall surface of the front end wall plate of the rear culvert body installation cabin, and the other end of each shield oil cylinder is fixedly provided with an axial iron jacking block which is used for contacting with the front end surface of the culvert body when the shield oil cylinders are jacked; when the open type shield machine is used for forwards tunneling, the shield oil cylinder jacks the installed culvert body, and the open type shield machine is pushed forwards by taking the installed culvert body as a counter-force mechanism.
3. The method for constructing the underground box culvert by using the open type shield tunneling machine according to claim 1 or 2, wherein mortar injection holes are respectively formed in the bottom surface and two side wall surfaces of the culvert body, and when the culvert body is installed and is positioned in the range of the tail retaining plate, grouting equipment is used for performing first grouting through the mortar injection holes in the culvert body so as to form a first grouting material layer in a gap between the outer wall surface of the culvert body and the open type shield tunneling machine; and after the culvert body is separated from the range of the open type shield tunneling machine, performing secondary grouting through the mortar injection hole on the culvert body by using grouting equipment so as to form a secondary grouting material layer in a gap between the primary grouting material layer and the soil body.
4. The method for constructing the underground box culvert by using the open type shield tunneling machine according to claim 1 or 2, wherein the size of the culvert body introduction box chamber is matched with that of the culvert body, and the culvert body introduction box chamber comprises a bottom plate and partition plates on two sides.
5. The method for constructing the underground box culvert by using the open type shield tunneling machine as claimed in claim 1 or 2, wherein sliding type soil retaining arms are respectively arranged on two sides of the front part of the front tunneling compartment, the front end parts of the sliding type soil retaining arms are wedge-shaped surfaces which are beneficial to cutting and jacking, and the rear end parts of the sliding type soil retaining arms are driven by a hydraulic oil cylinder in the front tunneling compartment to slide and stretch.
6. The method for constructing an underground box culvert by using the open type shield tunneling machine according to claim 1, wherein backfill soil covering is carried out above the culvert body which is completed by using a backfill soil excavating machine.
7. The method for constructing the underground box culvert by using the open type shield tunneling machine according to claim 1, wherein injection holes are respectively arranged on the bottom and two side wall surfaces of the machine body of the open type shield tunneling machine, and a friction reducer is injected into a gap between the machine body and an outer soil body through the injection holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010052748.1A CN111173523B (en) | 2020-01-17 | 2020-01-17 | Method for constructing underground box culvert by using open type shield tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010052748.1A CN111173523B (en) | 2020-01-17 | 2020-01-17 | Method for constructing underground box culvert by using open type shield tunneling machine |
Publications (2)
| Publication Number | Publication Date |
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| CN111173523A CN111173523A (en) | 2020-05-19 |
| CN111173523B true CN111173523B (en) | 2021-06-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352701A (en) * | 2013-07-08 | 2013-10-16 | 江苏锐成机械有限公司 | Shield propelling constructing method of shield tunneling machine |
| CN106744343A (en) * | 2017-01-19 | 2017-05-31 | 徐工集团凯宫重工南京有限公司 | A kind of box culvert loop wheel machine worked under low-headroom condition |
| CN206448823U (en) * | 2017-01-19 | 2017-08-29 | 徐工集团凯宫重工南京有限公司 | A kind of box culvert loop wheel machine for the synchronous box culvert construct of shield machine |
| CN207212358U (en) * | 2017-09-30 | 2018-04-10 | 中铁第四勘察设计院集团有限公司 | A kind of prefabricated box culvert |
| CN208594938U (en) * | 2018-05-24 | 2019-03-12 | 明达地下空间科技发展有限公司 | It is a kind of to walk the open shield excavation machine of type certainly |
-
2020
- 2020-01-17 CN CN202010052748.1A patent/CN111173523B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352701A (en) * | 2013-07-08 | 2013-10-16 | 江苏锐成机械有限公司 | Shield propelling constructing method of shield tunneling machine |
| CN106744343A (en) * | 2017-01-19 | 2017-05-31 | 徐工集团凯宫重工南京有限公司 | A kind of box culvert loop wheel machine worked under low-headroom condition |
| CN206448823U (en) * | 2017-01-19 | 2017-08-29 | 徐工集团凯宫重工南京有限公司 | A kind of box culvert loop wheel machine for the synchronous box culvert construct of shield machine |
| CN207212358U (en) * | 2017-09-30 | 2018-04-10 | 中铁第四勘察设计院集团有限公司 | A kind of prefabricated box culvert |
| CN208594938U (en) * | 2018-05-24 | 2019-03-12 | 明达地下空间科技发展有限公司 | It is a kind of to walk the open shield excavation machine of type certainly |
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| CN111173523A (en) | 2020-05-19 |
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